I bought one last time and it works well enough for me. I was able to order brackets from Lenovo (look at the previous sale for my comments that contained a link) but in the end didn’t need them. Took a month to ship from Lenovo so I followed someone else’s advice and did SSDs with some velcro stickers. Works well enough given no moving parts. Not sure how it would do with a normal HD but if you double up on velcro you are probably still ok.
You can get better but this was one of the few that met my specific needs (CPU specs, rackmount, and half depth so I could mount in a two post rack). Happy enough with the performance. Can’t recall what RAM I purchased but it was off Amazon and cheap enough.